1,2,4,5-苯四甲酸与稀土镨(Ⅲ)的溶剂热合成、晶体结构与性能分析

Solvent-thermal Synthesis,Structural Studies and Properties of a Novel Coordination Complex of Praseodymium(Ⅲ)with Benzene-1,2,4,5-tetracarboxylic Acid

以溶剂热法合成了一种结构新颖的稀土金属配合物[Pr_2(H_2btc)(btc)(H_2O)_2]_n,[1,2,4,5-均苯四甲酸(btcH_4);均苯四甲酸二氢根(H_2btc);均苯四甲酸根(btc)]。并对该化合物进行了红外、元素分析,X射线粉末衍射分析、热重分析和晶体结构分析。从结构分析中,发现目标化合物中Pr(Ⅲ)稀土金属离子与羧基氧原子和水中氧原子配位成键而生成九配位的配聚物,其中化合物通过[btcH_2]^(2-)和btc^(4-)交替连接而形成三维木梯型的空间拓扑结构。

A novel lanthanide complex of praseodymium formulated as [Pr_2(H_2btc)(btc)(H_2O)_2]_n,[benzene-1,2,4,5-tetracarboxylic acid(btcH_4)]was solvent-thermal synthesized.The complex was characterized by IR spectroscopy,elemental analysis,thermal analysis,X-ray powder diffraction and X-ray diffraction.The complex is formed by Pr(Ⅲ)atoms coordinated to nine O atoms from carboxylate groups of btcH_4 and water molecules.[btc]^(4-)and[btcH_2]^(2-)groups alternately connect the Pr(Ⅲ)cations in the complex.It forms a 3Dwooden ladder topology geometry via[btcH_2]^(2-)and btc^(4-).